Photographic camera



Z. GRUNFELD.

PHOTOGRAPHIC CAMERA. APPLICATION FILED AUG.6, 191s.

, 4 32 1 g Patent/aid Oct. 117, 1922, f V ,L 4 SHEETSSHEET I.

l I M M Z. GRUNFELD. PHOTOGRAPHIC CAMERA.

APPLICATION FILED-AUG-(L IQIB.

LQLSQJBQ, Patented Oct. 17, 11922..

4 SHEETS-SHEET 2.

amassin Z. .GB-U'N' FELD. PHOTOGRAPHIC CAMERA- APPLICATION FILED AUG.6,1918.

1,432, 1% Patnted Oct. 17, 11922.

4 SHEETS-SHEET 3.

Z. GRUNFELD.

PHOTOGRAPHIC CAMERA.

APPLICATION FILED AUG-6,1918.

1,432 1L8 Patented 00$. 11.7, 1922,

4 SHEETS-SHEET 4.

Patented @ct. 17, 1922.

UNHTEQ STATES PATENT @FFHQCE ZIGIVI'UNID GRU'NFELD, OF NEW YORK, N. Y.

PHOTOGRAPHIC CAMERA.

Application filed August 6, 1913. Serial No. 248,622.

To all whom it may concern:

Be it known that I, ZIGMUND Gni'mrnnn, a subject of the Emperor ofAustria, residing at the borough of Manhattan, in the county of NewYork, city and State of New York, have invented certain new and usefulImprovements in Photographic Cameras, of which the following is aspecification.

This invention relates to improvements in cameras of the type in whichsensitive film is wound up on a spoolan'd intermittently unwound topresent unexposed sur faces.

One of the objects of the invention is to provide an arrangement ofparts wherebythe scope of protection contemplated will appear from theclaims.

In the accompanying drawings, which are to be taken as part of thisspecification, and in which I have shown merely a preferred form ofembodiment of the invention,

Figure 1 is a side View of camera with the bellows extended and the sideof the box broken away; Figure 2 afront view of the same; Figure 3 is aView similar to Figure 2 showing the camera closed, but with part of thefront closure broken away; Figure the film-actuating mechanism; Figure 5is a detail in elevation of certain of the parts shown in section inFigure 4; Figure 6 is a detail sectional view of part of the filmcontroldevice; Figure 7 is a view taken on the line 77 of Figure 6; Figure 8 isa sectional view taken. on the line 8-8 of Figure (3; Figure 9 is asectional view taken on the line 9-9 of Figure 6; Figure 10 is anenlarged end view of the finger-piece for manual operation of the filmand .for re-.

winding of the film spool actuating spring; Figure 11 is a detail of thecontrol drum;

4; is an enlarged detail of a part of,

Figure 12 is a detail view of. the strap; F igure 13 is a view similarto Figure 6, but showing the control drum also in section, and with theshaft 36 pulled out so that clutches 36 and 38 are disengaged from thefilm spool and the drum respectively; and Figure 1 1 is a View similarto Figure 13, but with the parts in the Figure 6 position. Referring tothe numerals on the drawings, there is shown in Figures 1, 2 and 3 acamera of standard type; The shutter is controlled by the usualfinger-piece indicated at 12 in Figures 1 and 2, and a cord 14: isconnected to this finger-piece 12, as shown in Figure 1, so that as thefingerpiece 12 is moved in the'direction of the arrow of Figure 2 ortowards the left, the result is to move the cord 14: upwardly, or in thedirection of the arrow, Figure 2. Cord 1e from its point of attachmentruns through suitable eyelets or the'like 15 to a point within thecamera box 16 whence it travels upwardly (Figure 1) and is connected tothe end of a flexible strap 17. This strap is provided with cut-outportions 18 as shown in Figure 12,. and is wound on a spool 19 whichspoolis controlled by a coiled spring 20 that tends to keep the strap 17always wound .up on'the spool. The reason for this arrangement is thatwhen the camera is closed the slack in the cord 1% and strap 17 isautomatically taken up by the spring 20 and when the camera is opened upthe necessary extensionof the cord and strap are permitted. Suitablysupported on the inside of the box adjacent the spool 19 is a connectingmember 21, having one end formed with a hook 22 which is adapted toengage in the cut-outs 18 of the strap 17 as shown in Figure 41. Thisconnecting member 21 is. provided with a knob 24 at v the outside of thecamera box and there is also preferably a light shield 25 interposedbetween the connecting member 21 and the knob 24;, this shield slidingon the inner surface of the camera box around the opening through whichthe knob 24; extends. When the parts are in the position shown in Figure4: the hook end 22 of the connecting member will engage with a cut-outportion 18 of the strap 17, but if such connection is not desired, asfor instance, before opening up the camera, the knob 24: may be pulledto the left (Figure 1) and engaged in the clip 26, the result of thisbeing to keep the hook end 22 of the connecting member 21 out of thepath of travel of the strap 17 The upper end of the connecting member 21is pivoted as indicated at 27, to permit of thls movement of the hookend 22 away from the strap 17 and it will be understoodof course thatthe light shield 25 is flexible also. The pivotal connection 27 is to aslide 28 and to this slide is'connected a cord 29 having somewhere inits length a shockabsorbing spring 30, this cord 29 being connnected at}its other end 'to a pivoted finger .u31'which is controlled'bya coiledspring 32 viiwhereby it is normally urged tomovement {T lLOWELIdS "theright (Figures 3, 6 and 9). The bend of this finger '31 engages ingrooves 34 of a drum 35 which is rotatably mounted on .riil hub 54carried by bracket Drum 35 as also has a bearing 35 on theshait 36,shaft i136 passing through hub 54 and drum'35.

zoaiDrum 35 rotates with shaft 36, but theshattiis movablelongitudinally of the drum, by

'rmeans of a pin 53 in the bearing member a mwhich passes through aslot" of the'sha'ft.

-rSpring is secured at one end to the sta- 5ntionary hub 54 and at theother end to drum e135. Shaft 36 may also. carry a pin 38 toueng'age-with approprlate notches 39 of drum at; 3535 (Figure 7 Theshaft 36 is normally :amaintained in 'the Figure 14 positionby means ofa spring 40 thatpresses against a iicollar on the shaft to urge ittowards rthe left. However by pulling the shaft or: fftowards the right,the' connection between mthe clutch end 36 of the shaft and the film'etake-up spool 37 is broken, so that the shaft e and drum maybe rotatedto putthe coil gspring 44' under tension, handle42 being number of filmexposures for which the' camera is adapted. l have illustrated twelvesuch grooves, which means that the appara- 5d jtus is designed tooperate with a film spool 5 0f twelve exposures. Starting with the"Figure '14 position of the parts, and assuming that the shutter controlpiece "12 is op- -"'erated thisresult's in an upward pull-in the 552cord 14 and a downward pull on the strap 17. Because of theengagement'of the hook" end 22 ofthe connecting member 21 with the ofthe'slide 28 and a consequent pull'on the ""cord 29, which again causesthe lever end 31 to move towards thele'l't "away from a stop 45 in thefirst groove 34. and through a cut-outportion'470i the side wall of thisgroove into the'next groove 34. The drum 35 now rotatesunder theinfluence of spring strap'17, this results in a downward travel Y stopmembers 45, until it reaches the Figure 14 position, the stop membersbeing prefer- 'ablybeveled as indicated in Figure 11 to facilitate thisrightwards traverse of the lever end 31, under the influence ofits'spning 32. This reverse rotation of the shaft and drum not onlybrings the finger 31 back to starting position, but restores the tensionof drum spring When theicamera is to be opened'the'knob 24. must beengaged by the clip 26, so that there is no actuation 0t cord 29,but'be'fore an exposure is made, ofcourse, the'knob 24 must bereleased,topermit'hook 22 to engagewitli strap 17, so that upon actuation of theshutter the intermittent movement of the drum and consequently of thefilm may take place.

In order to make the device as inexpensive as possible I propose toconstruct the drum 35 of sheet metal, with the grooves pressed thereinand the stop members formed in the pressing of parallel grooves on theperiphery of said drum, a stop 'arranged'in each of said grooves, a pawladapted for engagement with the stops andmeans for transversely movingthe pawl from engagementwith one stop into the next adjacent parallelgroove" and in the path of the stop thereinto allow for an intermittentrelease of the spring actuated drum.

In a filnrfeeding mechanism for a camera comprising a film spool and-aspring actuated drum associated therewith, a series of annular grooveson'the periphery ofsaid drum, a. stop arranged 1n each of said grooves,a pawl adapted fonengagement with the stops, and; means for transverselymoving-the pawl from'groove to'groove to allow for an intermittentrelease of the spring actuated drum.

camera comprising a film spool and a spring actuated drumas'sociatedtherewith, a series of annular groo es on the periphery of said drum, acommunicating-passage between adjacent grooves onthe drum, a stoparranged in each groove adjacent the communicating aassa 'e a )awl 'adaJtGCl for en 'a 'ement b 7 b with the stops, and means for moving thepawl through the communicating passage from groove to groove to allowfor an intermittent release of the spring actuated drum.

4:. In a film feeding mechanism for a camera comprising a film spool anda spring actuated drum associated therewith, a series of annular groovesarranged on the periphery of said drum, a communicating passage betweenadjacent annular grooves, a stop positioned in each of said grooves, apawl adapted for coaction with said stops, means for moving the pawlfrom groove to groove to allow for an intermittent release of the springactuated drum, and means for returning the pawl through the grooves toits initial position on the reverse movement of said drum.

5. In a film feeding mechanism for a camera comprising a film spool anda spring actuated drum associated therewith, a series of annular grooveson the periphery of said drum, progressively arranged stops one in eachof said grooves, a pawl adapted for engagement with said stops, andmeans for transversely moving the pawl from groove to groove to allowfor an intermittent release of the spring actuated drum.

6. In a film feeding mechanism for a camera comprising a film spool anda spring actuated drum associated therewith, a series of progressivelyarranged abutments on the peripheral surface of said drum, a pawladapted for engagement with the abutments, and means for transverselymoving the pawl from the aath of one abutment and into the path ofmovement of the adjacent abutment thereby allowing during said movementa single revolution of the spring actuated drum.

In testimony whereof I affix my signature.

ZIGMUND GRUNFELD.

